The Janet Collection Mambo Open LoopTM Brazilian Braid 18" is perfect for those who have trouble with loose knots when using braids. Made from 100% toyokalon and kanekalon fibers, this crochet hair is patented with a one-of-a-kind design which allows the user to quickly tighten loops with a double loop feature while also holding onto the hair and protecting it. You will be amazed with the uniform ridges that creates this beautiful style.JANET COLLECTOON